Find the Zeros of the Function Algebraically $f ( x ) = \frac { 1 } { 8 } x ^ { 3 } - x$

Multiple Choice

Find the zeros of the function algebraically.
$f ( x ) = \frac { 1 } { 8 } x ^ { 3 } - x$

A) $x = 0 , \sqrt { 8 }$
B) $x = 0 , - \sqrt { 8 }$
C) $x = 0 , \pm 8$
D) $x = 0 , \pm \sqrt { 8 }$
E) $x = 0,8$